Bought. I absolutely love Halo. It's like putting on a pair of comfy slippers at this point.
On the visuals, it'll always be old graphics for me. When playing Halo on Xbox One I always used to think it was interesting that the game holds up - both visually and gameplay wise - in the same way I believe many PC shooters from the same era do. "Early 2000's PC game" has a look and style to it that Halo shares. Now it's actually on PC, I've been able to put that to the test, and I'm enjoying it so much in the same way I can still flawlessly go back to Half-Life, Half-Life 2, Doom 3, System Shock 2 etc.